摘要
稀土离子因其特有的结构,具有较好的荧光特性,能与许多有机配体形成有良好荧光性能的配合物。简要介绍了双β-二酮配体的合成,研究了Eu3+、Tb3+双β-二酮配合物体系的荧光性能,该体系具有良好的荧光特性。通过对其紫外光谱、荧光光谱测定和对比,分析了不同因素,包括溶剂、配体结构、pH值等因素对体系荧光强度的影响。实验结果表明:稀土(Eu3+,Tb3+)-β-二酮体系在乙醇溶液中其荧光强度比在水溶液中大得多;乳化剂OP能增强体系荧光强度;在pH约为6时荧光最强;不同结构的β-二酮配体与稀土离子所形成的配合物的荧光强度顺序为H2L1>H2L2>H2L3;Eu3+比Tb3+能更好地与这些β-二酮匹配,其中Eu3+与β-二酮配体H2L1形成的配合物荧光性能最好。
Because its unique structure, the rare earth ion has the better fluorescence specific, and could react with many organic ligands to form the good fluorescence complexes. This article simply has introduced synthesis of bis β-ketone and studied fluorescence performance of Eu^3＋ , Tb^3＋ -bis β-ketone system. This system has the good fluorescence characteristic through its fluorescence spectrum determination and contrast, analysis of the different factor, including the solvent, ligand structure, the influence of pH value on the fluorescence intensity. The experiment result showed： in the system of rare earth （ Eu^3＋ or Tb^3＋） bis-β-ketone, the luminescence intensity was higher in the ethanol than that in the water. Emulsifier OP enhanced the luminescence greatly. The effect of pH was investigated in the range of 4 -10, but the luminescence signal was observed to be the strongest at pH = 6. The effect of different ligands was studied also, and the sequence of the enhance is： H2L1 〉 H2L2 〉 H2L3. The Eu^3＋ has a nice match with the bis-β-ketone ligands, but Tb^3＋ didn＇t match with the bis-β-ketone ligands perfectly, and the luminescence intensity of the Eu^3＋ -H2L^1 complex is the strongest in three ligands complexes.
出处
《发光学报》
EI
CAS
CSCD
北大核心
2006年第1期105-112,共8页
Chinese Journal of Luminescence
基金
广西自然科学基金资助项目(0135009)
